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GENERAL PREFACE
THE EVOLUTION OF MODESTY-1.1
THE EVOLUTION OF MODESTY-1.2
THE EVOLUTION OF MODESTY-1.3
THE EVOLUTION OF MODESTY-1.4
THE EVOLUTION OF MODESTY-1.5
THE EVOLUTION OF MODESTY-1.6
THE EVOLUTION OF MODESTY-2.1
THE EVOLUTION OF MODESTY-2.2
THE EVOLUTION OF MODESTY-2.3
THE EVOLUTION OF MODESTY-2.4
THE EVOLUTION OF MODESTY-2.5
THE EVOLUTION OF MODESTY-3
THE EVOLUTION OF MODESTY-4
THE PHENOMENA OF SEXUAL PERIODICITY-1.1
THE PHENOMENA OF SEXUAL PERIODICITY-1.2
FOOTNOTES
THE PHENOMENA OF SEXUAL PERIODICITY-2.1
THE PHENOMENA OF SEXUAL PERIODICITY-2.2
THE PHENOMENA OF SEXUAL PERIODICITY-2.3
THE PHENOMENA OF SEXUAL PERIODICITY-3.1
THE PHENOMENA OF SEXUAL PERIODICITY-3.2
THE PHENOMENA OF SEXUAL PERIODICITY-3.3
THE PHENOMENA OF SEXUAL PERIODICITY-3.4
THE PHENOMENA OF SEXUAL PERIODICITY-3.5
FOOTNOTES
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-1.1
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-1.2
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-1.3
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-1.4
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-1.5
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-1.6
FOOTNOTES
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-2.1
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-2.2
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-2.3
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-2.4
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-3.1
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-3.2
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-3.3
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-3.4
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-3.5
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-3.6
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-3.7
FOOTNOTES
APPENDIX A-1.1
APPENDIX A-1.2
APPENDIX B-1.1
APPENDIX B-1.2
APPENDIX C-1.1
APPENDIX C-1.2
INDEX OF AUTHORS

shown, and the average number of births (not conceptions) per 

day, for the whole period, is as follows:-- 

 

Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. 

10.5 11.4 11 8.3 10.2 10.5 11.5 12.6 12.3 11.6 12 11.7 

 

There is thus a well-marked minimum of conceptions (a depression 

appearing here in each of the three periods, separately) about 

the month of July. (In the second period, however, which contains 

the smallest number of births, the minimum occurs in September.) 

From that low minimum there is steady and unbroken rise up to the 

chief maximum in November. (In the first period, however, the 

maximum is delayed till January, and in the second period it is 

somewhat diffused.) There is a tendency to a minor maximum in 

February, specially well marked in the third and most important 

period, and in the first period delayed until March. 

 

A very curious and perhaps not accidental coincidence might be briefly 

pointed out before we leave this part of the subject. It is found[157] by 

taking 3000 cases of children dying under one year that, among the general 

population, children born in February and September (and therefore 

conceived in May and December) appear to possess the greatest vitality, 

and those born in June, and, therefore, conceived in September, the least 

vitality.[158] As we have seen, May and December are precisely the periods 

when conceptions in Europe generally are at a maximum, and September is 

precisely the period when they are at a minimum, so that, if this 

coincidence is not accidental, the strongest children are conceived when 

there is the strongest tendency to procreate, and the feeblest children 

when that tendency is feeblest. 

 

Nelson, in his study of dreams and their relation to seasonal ecbolic 

manifestations, does not present any yearly ecbolic curve, as the two 

years and a half over which his observations extend scarcely supply a 

sufficient basis. On examining his figures, however, I find there is a 

certain amount of evidence of a yearly rhythm. There are spring and autumn 

climaxes throughout (in February and in November); there is no December 

rise. During one year there is a marked minimum from May to September, 

though it is but slightly traceable in the succeeding year. These figures 

are too uncertain to prove anything, but, as far as they go, they are in 

fair agreement with the much more extensive record, that of W.K. (_ante_ 

p. 113), which I have already made use of in discussing the question of a 

monthly rhythm. This record, covering nearly twelve years, shows a general 

tendency, when the year is divided into four periods (November-January, 

February-April, May-July, August-October) and the results summated, to 

rise steadily throughout, from the minimum in the winter period to the 

maximum in the autumn period. This steady upward progress is not seen in 

each year taken separately. In three years there is a fall in passing from 

the November-January to the February-April quarter (always followed by a 

rise in the subsequent quarter); in three cases there is a fall in passing 

from the second to the third quarter (again always followed by a rise in 

the following quarter), and in two successive years there is a fall in 

passing from the third to the fourth quarter. If, however, beginning at 

the second year, we summate the results for each year with those for all 

previous years, a steady rise from season to season is seen throughout. If 


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